#! /bin/sh ########################################################################### ## ## ## Copyright (c) 2015, Red Hat Inc. ## ## ## ## This program is free software: you can redistribute it and/or modify ## ## it under the terms of the GNU General Public License as published by ## ## the Free Software Foundation, either version 3 of the License, or ## ## (at your option) any later version. ## ## ## ## This program is distributed in the hope that it will be useful, ## ## but WITHOUT ANY WARRANTY; without even the implied warranty of ## ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the ## ## GNU General Public License for more details. ## ## ## ## You should have received a copy of the GNU General Public License ## ## along with this program. If not, see . ## ## ## ## Author: Li Wang ## ## ## ########################################################################### ## ## ## Summary: panic while using userstacktrace ## ## ## ## BUG: unable to handle kernel paging request at 00000000417683c0 ## ## IP: [] update_curr+0x124/0x1e0 ## ## PGD 41a796067 PUD 0 ## ## Thread overran stack, or stack corrupted ## ## Oops: 0000 [#1] SMP ## ## last sysfs file: ../system/cpu/cpu15/cache/index2/shared_cpu_map ## ## ## ## The bug was fixed by: ## ## 1dbd195 (tracing: Fix preempt count leak) ## ## ## ########################################################################### export TCID="ftrace_regression01" export TST_TOTAL=1 . ftrace_lib.sh LOOP=10 TSTACK_TRACE_PATH="/proc/sys/kernel/stack_tracer_enabled" EXC_PAGE_FAULT_ENABLE="$TRACING_PATH/events/exceptions/page_fault_kernel/enable" MM_PAGE_FAULT_ENABLE="$TRACING_PATH/events/kmem/mm_kernel_pagefault/enable" ftrace_userstacktrace_test() { if [ ! -e "$TSTACK_TRACE_PATH" ]; then tst_brkm TCONF "Stack Tracer is not cofigured in This kernel" fi for i in $(seq $LOOP); do echo 1 > $TSTACK_TRACE_PATH echo userstacktrace > $TRACING_PATH/trace_options grep -q "^userstacktrace" $TRACING_PATH/trace_options if [ $? -ne 0 ]; then tst_brkm TBROK "Failed to set userstacktrace" fi if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then exc_page_fault_enable=`cat $EXC_PAGE_FAULT_ENABLE` echo 1 > $EXC_PAGE_FAULT_ENABLE else mm_page_fault_enable=`cat $MM_PAGE_FAULT_ENABLE` echo 1 > $MM_PAGE_FAULT_ENABLE fi done if [ -f "$EXC_PAGE_FAULT_ENABLE" ]; then echo "$exc_page_fault_enable" > $EXC_PAGE_FAULT_ENABLE else echo "$mm_page_fault_enable" > $MM_PAGE_FAULT_ENABLE fi tst_resm TPASS "Finished running the test" } ftrace_userstacktrace_test tst_exit